Ear Size and Position Variations Rated by Casual Observers on Artificial Intelligence-Generated Models.

BACKGROUND

Auricular asymmetry affects facial aesthetics; yet, the degree of asymmetry discernible by a casual observer remains poorly defined.

OBJECTIVE

To measure the casual observer's perception of auricular size, angulation, protrusion, and vertical position.

METHODS

Artificial intelligence-generated facial images were utilized and unilateral variations created in (1) size, (2) angulation, (3) protrusion, and (4) vertical position. A total of 200 responders reviewed 46 images, rating the ear appearance on a Likert scale of 0-10.

RESULTS

Causal observers rated a ≥10% change in size significantly different than baseline (p < 0.001). Retrograde angulation ≥10° and anterograde angulation at 20° were rated significantly different than baseline (p < 0.001). Positive asymmetrical protrusion was rated more severely than negative asymmetrical protrusion. The vertical position difference was rated least critically on average compared with baseline.

CONCLUSION

Casual observers more critically perceived auricular size asymmetry and retrograde angulation when compared with protrusion and vertical position asymmetry.